[qsucvatz]

Going to $0 is -Inf% loss.

[oscilloscope]

Then if I lose 100% of my investment, how much have I lost?

[kamaal]

Everything.

Sometimes its easier to describe this in terms of words, than numbers and symbols.

[icebraining]

Everything is not that bad. Many people lose more than that on the regular stock market (using leverage).

[hervature]

Usually there is margin liquadation levels that are in place so you can't lose ore than 100%.